My crappy terminal OS

Makefile 1.7KB

    C_SOURCES = $(wildcard kernel/*.c drivers/*.c cpu/*.c libc/*.c programs/*.c util/*.c) HEADERS = $(wildcard kernel/*.h drivers/*.h cpu/*.h libc/*.h programs/*.h util/*.c) # Nice syntax for file extension replacement OBJ = ${C_SOURCES:.c=.o cpu/interrupt.o} # Change this if your cross-compiler is somewhere else CC = /home/stephen/opt/cross/bin/i686-elf-gcc GDB = /home/stephen/opt/cross/bin/i686-elf-gdb # -g: Use debugging symbols in gcc CFLAGS = -g -m32 -nostdlib -nostdinc -fno-builtin -fno-stack-protector -nostartfiles -nodefaultlibs \ -Wall -Wextra -Werror # First rule is run by default os-image.bin: boot/bootsect.bin boot/bootsect2.bin kernel.bin cat $^ > os-image.bin #Pad os-image.bin #dd if=/dev/null of=os-image.bin bs=1 count=0 seek=1474560 # '--oformat binary' deletes all symbols as a collateral, so we don't need # to 'strip' them manually on this case kernel.bin: boot/kernel_entry.o ${OBJ} i686-elf-ld -o $@ -Ttext 0x8800 $^ --oformat binary # Used for debugging purposes kernel.elf: boot/kernel_entry.o ${OBJ} i686-elf-ld -o $@ -Ttext 0x8800 $^ run: os-image.bin qemu-system-i386 -fda os-image.bin # Open the connection to qemu and load our kernel-object file with symbols debug: os-image.bin kernel.elf qemu-system-i386 -s -fda os-image.bin -d guest_errors,int & ${GDB} -ex "target remote localhost:1234" -ex "symbol-file kernel.elf" # Generic rules for wildcards # To make an object, always compile from its .c %.o: %.c ${HEADERS} ${CC} ${CFLAGS} -ffreestanding -c $< -o $@ %.o: %.asm nasm $< -f elf -o $@ %.bin: %.asm nasm $< -f bin -o $@ clean: rm -rf *.bin *.dis *.o os-image.bin *.elf rm -rf kernel/*.o boot/*.bin drivers/*.o boot/*.o cpu/*.o libc/*.o